# Description
- Removes unneeded extensions from headless app file
- Limits CPU threads when running multi-GPU training to minimize thread
context switching
- Apply multi GPU renderer setting to avoid unnecessary GPU context
initialization
- Decreases 8k SH startup time on 8 GPUs from > 5 min to 1 min
- Adds benchmarking scripts

## Type of change

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applicable. -->

- Bug fix (non-breaking change which fixes an issue)

## Checklist

- [x] I have run the [`pre-commit` checks](https://pre-commit.com/) with
`./isaaclab.sh --format`
- [ ] I have made corresponding changes to the documentation
- [x] My changes generate no new warnings
- [ ] I have added tests that prove my fix is effective or that my
feature works
- [x] I have updated the changelog and the corresponding version in the
extension's `config/extension.toml` file
- [ ] I have added my name to the `CONTRIBUTORS.md` or my name already
exists there

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- [x] I have done this task
- [ ] I have not done this task
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Co-authored-by: Alexander <143108850+nv-apoddubny@users.noreply.github.com>
Co-authored-by: David Hoeller <dhoeller@nvidia.com>